/*
 * Copyright (c) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef HDI_DRM_LAYER_H
#define HDI_DRM_LAYER_H
#include <xf86drm.h>
#include <xf86drmMode.h>
#include "buffer_handle.h"
#include "display_common.h"
#include "drm_fourcc.h"
#include "hdi_layer.h"
#include "hdi_device_common.h"

namespace OHOS {
    namespace HDI {
        namespace DISPLAY {
            const int INVALID_DRM_ID = 0;
            class DrmGemBuffer {
            public:
                DrmGemBuffer(int drmFd, HdiLayerBuffer &hdl);
                virtual ~DrmGemBuffer();
                uint32_t GetFbId() const
                {
                    return mFdId;
                }
                bool IsValid();

            private:
                void Init(int drmFd, HdiLayerBuffer &hdl);
                uint32_t mGemHandle = 0;
                uint32_t mFdId = 0;
                int mDrmFd = -1; // the fd can not close. the other module will close it.
                uint32_t mDrmFormat = DRM_FORMAT_INVALID;
            };

            class HdiDrmLayer : public HdiLayer {
            public:
                explicit HdiDrmLayer(LayerType type) : HdiLayer(type)
                {
                }
                ~HdiDrmLayer() override
                {
                }
                // Return value optimization
                DrmGemBuffer *GetGemBuffer();

            private:
                std::unique_ptr<DrmGemBuffer> mCurrentBuffer;
                std::unique_ptr<DrmGemBuffer> mLastBuffer;
            };
        } // namespace OHOS
    }     // namespace HDI
} // namespace DISPLAY

#endif // HDI_DRM_LAYER_H
